146251021 has 4 divisors (see below), whose sum is σ = 167144032. Its totient is φ = 125358012.

The previous prime is 146251019. The next prime is 146251033. The reversal of 146251021 is 120152641.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 146251021 - 2¹ = 146251019 is a prime.

It is a super-2 number, since 2×146251021² = 42778722287084882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 146250983 and 146251001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146251081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10446495 + ... + 10446508.

It is an arithmetic number, because the mean of its divisors is an integer number (41786008).

Almost surely, 2^146251021 is an apocalyptic number.

It is an amenable number.

146251021 is a deficient number, since it is larger than the sum of its proper divisors (20893011).

146251021 is an equidigital number, since it uses as much as digits as its factorization.

146251021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20893010.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 146251021 is about 12093.4288355288. The cubic root of 146251021 is about 526.8653475593.

The spelling of 146251021 in words is "one hundred forty-six million, two hundred fifty-one thousand, twenty-one".